---
schema_version: "secwatch.filing_event.v1"
accession: "0000887343-26-000142"
form_type: "8-K"
ticker: "COLB"
cik: "0000887343"
company_name: "COLUMBIA BANKING SYSTEM, INC."
filed_at: "2026-05-15T17:39:35+00:00"
generated_at: "2026-05-15T17:40:45.962646+00:00"
event_type: "other_material"
sentiment: "neutral"
materiality_score: 0.25
calibrated_materiality_score: 0.15
confidence: "high"
source: SEC EDGAR
---

# Columbia Banking shareholders elect all 12 directors, approve say-on-pay and auditor ratification

## Summary
- All 12 director nominees elected with significant votes; highest 'against' was 16.4M for Luis F. Machuca.
- Advisory vote on executive compensation passed with 240.3M for vs 12.9M against.
- Ratification of Deloitte & Touche as auditor for FY 2026 approved with 269.3M for, 792k against.
- Approximately 270.3M of 290.0M outstanding shares were present or represented at the meeting.

## SEC filing metadata
- accession: 0000887343-26-000142
- form_type: 8-K
- ticker: COLB
- cik: 0000887343
- company_name: COLUMBIA BANKING SYSTEM, INC.
- filed_at: 2026-05-15T17:39:35+00:00
- event_type: other_material
- sentiment: neutral
- materiality_score: 0.25
- calibrated_materiality_score: 0.15
- confidence: high
- sec_items: 5.07
- EDGAR index: https://www.sec.gov/Archives/edgar/data/887343/000088734326000142/0000887343-26-000142-index.htm
- EDGAR primary document: https://www.sec.gov/Archives/edgar/data/887343/000088734326000142/colb-20260514.htm

## Machine-readable alternates
- HTML: https://secwatch.observer/filing/0000887343-26-000142
- JSON: https://secwatch.observer/filing/0000887343-26-000142.json
- Plain text: https://secwatch.observer/filing/0000887343-26-000142.txt

## Key facts
- Shareholder Votes
  COLUMBIA BANKING SYSTEM, INC. shareholders approved Advisory (non-binding) resolution to ratify the appointment of Deloitte & Touche LLP as independent registered public accounting firm for fiscal year ending December 31, 2026 at the 2026-05-14 meeting.
  - Proposal: auditor ratification
  - Outcome: passed
  - Meeting: 2026-05-14
  source text: 3. An advisory (non-binding) resolution to ratify the appointment of Deloitte & Touche LLP as the Company's independent registered public accounting firm for the fiscal year ending December 31, 2026
  evidence_url: https://www.sec.gov/Archives/edgar/data/887343/000088734326000142/0000887343-26-000142-index.htm
- Shareholder Votes
  COLUMBIA BANKING SYSTEM, INC. shareholders approved Advisory (non-binding) resolution to approve the compensation of the Company's named executive officers at the 2026-05-14 meeting.
  - Proposal: say on pay
  - Outcome: passed
  - Meeting: 2026-05-14
  source text: 2. An advisory (non-binding) resolution to approve the compensation of the Company's named executive officers
  evidence_url: https://www.sec.gov/Archives/edgar/data/887343/000088734326000142/0000887343-26-000142-index.htm
- Shareholder Votes
  COLUMBIA BANKING SYSTEM, INC. shareholders approved Election of twelve directors to serve on the board until the 2027 Annual Meeting at the 2026-05-14 meeting.
  - Proposal: director election
  - Outcome: passed
  - Meeting: 2026-05-14
  source text: 1. The election of twelve directors to serve on the board of directors of the Company until the Company’s 2027 Annual Meeting of Shareholders or until their successors have been elected and have qualified
  evidence_url: https://www.sec.gov/Archives/edgar/data/887343/000088734326000142/0000887343-26-000142-index.htm

This AI-assisted summary is a reading aid. Review the linked SEC EDGAR filing before relying on any specific claim.